Texas Instruments INA296B1QDGKRQ1

Overview

INA296B1QDGKRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive-qualified, bidirectional current sense amplifier with −5V to 110V common-mode input range, 10V/V fixed gain, 1.1MHz bandwidth, and ±150µV max input offset voltage. It enables high-precision shunt-based current monitoring in high-voltage DC/DC converters and battery management systems.

For engineers reviewing the INA296B1QDGKRQ1 datasheet, INA296B1QDGKRQ1 pinout, INA296B1QDGKRQ1 application, or INA296B1QDGKRQ1 equivalent, this page delivers verified specifications, package mapping, functional context for high-side/low-side sensing, and validated alternatives for automotive-grade current measurement design.

Technical Context

The INA296B1QDGKRQ1 uses a zero-drift, precision topology to achieve ±150µV max input offset and ±0.1% max gain error across −40°C to +125°C, supporting accurate low-V_SENSE measurements down to millivolt levels. Its 1.1MHz bandwidth and 8V/µs slew rate enable fast overcurrent detection in transient-rich power stages.

It operates from 2.7V–20V supply while accepting common-mode inputs beyond the supply rails (−5V to 110V), enabling direct integration into 48V automotive systems without level-shifting. The dual reference pins (REF1/REF2) allow configurable unidirectional or bidirectional output swing relative to ground or supply rail.

Key Specifications

Pinout & Package

VSSOP-8 (DGK) package: 3mm × 4.9mm body, 0.65mm pitch, exposed thermal pad (not electrically connected).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar current sense amplifier applications.

Compared with INA240A1QDRQ1 and MAX40056ATA+T, the INA296B1QDGKRQ1 delivers superior high-speed performance and wider common-mode range - making it the preferred choice for next-generation 48V/800V automotive power systems requiring fast fault detection and extended temperature operation.

Availability

INA296B1QDGKRQ1 is available at Aetrix Electronics and suitable for automotive power conversion, battery management, and smart junction box applications requiring stable component supply and long-term production continuity.

Supply support for INA296B1QDGKRQ1 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor leader specializing in analog and embedded processing technologies, with deep expertise in automotive-grade signal conditioning and power management ICs.

The INA296x-Q1 product line is designed specifically for high-accuracy, high-bandwidth current sensing in AEC-Q100-compliant automotive subsystems - including 48V mild-hybrid converters, EV battery monitors, and intelligent power distribution units.

FAQ

What is the maximum common-mode voltage the INA296B1QDGKRQ1 can withstand during operation?

The INA296B1QDGKRQ1 has an operational common-mode input range of −5V to 110V. Its survival rating extends to −20V to 120V, meaning it can tolerate brief transients within that envelope without damage. This allows direct connection to 48V or 60V automotive buses without external protection circuitry, provided the continuous operating voltage stays within the −5V to 110V window. The INA296B1QDGKRQ1 maintains specified performance across this full range.

Does the INA296B1QDGKRQ1 support bidirectional current sensing, and how is it configured?

Yes, the INA296B1QDGKRQ1 supports bidirectional current sensing via its REF1 and REF2 pins. When both pins are biased at VS/2, the output centers at VS/2 and swings ±10×V_SENSE, enabling positive/negative current detection. For unidirectional use, grounding both REF pins sets output to 0–VS scaling. This flexibility makes the INA296B1QDGKRQ1 suitable for regenerative braking monitoring and charge/discharge tracking in BMS applications.

What is the guaranteed input offset voltage specification for the INA296B1QDGKRQ1 over temperature?

The INA296B1QDGKRQ1 guarantees a maximum input offset voltage of ±150µV over the full operating temperature range of −40°C to +125°C. Its offset drift is specified at ±0.5µV/°C max, resulting in ≤±0.5mV total drift across the 165°C span. This performance enables sub-1mA current resolution with a 100mΩ shunt, critical for precision sleep-mode current monitoring in automotive junction boxes.

Can the INA296B1QDGKRQ1 be used in high-side, low-side, and in-line current sensing configurations?

Yes, the INA296B1QDGKRQ1 supports all three configurations. In high-side mode, IN+ connects to the bus and IN− to the shunt load side. In low-side mode, IN+ connects to the shunt load side and IN− to ground. In in-line mode, it measures current flowing between two voltage domains. Its −5V to 110V common-mode range and rail-to-rail output capability make it uniquely suited for high-side sensing in 48V systems without level-shifting components.

What package type and thermal characteristics apply to the INA296B1QDGKRQ1?

The INA296B1QDGKRQ1 is supplied in the DGK (VSSOP-8) package: 3mm × 4.9mm body, 0.65mm lead pitch, with an exposed thermal pad. Its junction-to-ambient thermal resistance (R_θJA) is 167.2°C/W, and junction-to-board (R_θJB) is 88.9°C/W. These values assume standard JEDEC 2-layer board layout; adding copper pour under the thermal pad reduces R_θJB significantly, improving power dissipation margin for continuous 2.5mA operation in sealed enclosures.